Add src/01part2.rs

src/01part2.rs

@@ -0,0 +1,115 @@
+use std::fs;
+
+fn main() {
+    let file_path = "input/01input.txt";
+    let contents = fs::read_to_string(file_path).expect("should read file");
+    let lines = contents.lines();
+    let mut sum = 0;
+    for line in lines {
+        let mut line_chars = line.chars();
+        let mut line_chars_rev = line.chars().rev();
+        let mut left_found = false;
+        let mut right_found = false;
+        let mut left_num: u32 = 0;
+        let mut right_num: u32 = 0;
+        let mut left_chars: Vec<char> = Vec::new();
+        let mut right_chars: Vec<char> = Vec::new();
+        while !left_found || !right_found {
+            if !left_found {
+                left_chars.push(line_chars.next().unwrap());
+                if left_chars.last().unwrap().is_digit(10) {
+                    left_num = left_chars.last().unwrap().to_digit(10).unwrap();
+                    left_found = true;
+                } else {
+                    left_num = num_from_word(&left_chars);
+                    while left_num == 10 || left_num == 12 {
+                        left_chars.remove(0);
+                        left_num = num_from_word(&left_chars);
+                    }
+                    if left_num < 10 {
+                        left_found = true;
+                    }
+                }
+            }
+            if !right_found {
+                right_chars.insert(0, line_chars_rev.next().unwrap());
+                if right_chars.first().unwrap().is_digit(10) {
+                    right_num = right_chars.first().unwrap().to_digit(10).unwrap();
+                    right_found = true;
+                } else {
+                    right_num = num_from_word(&right_chars);
+                    while right_num == 10 || right_num == 11 {
+                        right_chars.pop();
+                        right_num = num_from_word(&right_chars);
+                    }
+                    if right_num < 10 {
+                        right_found = true;
+                    }
+                }
+            }
+        }
+        println!("{}{}", left_num, right_num);
+        sum += left_num * 10 + right_num;
+    }
+    println!("{}", sum);
+}
+
+fn num_from_word(word: &Vec<char>) -> u32 {
+    let transformed_word = word.into_iter().fold(String::new(), |w, c| {w.to_owned() + &c.to_string().to_string()});
+    match transformed_word.as_str() {
+        "one" => {return 1},
+        "o" => {return 13},
+        "on" => {return 11},
+        "ne" => {return 12},
+        "two" => {return 2},
+        "t" => {return 13},
+        "tw" => {return 11},
+        "wo" => {return 12},
+        "three" => {return 3},
+        "th" => {return 11},
+        "thr" => {return 11},
+        "thre" => {return 11},
+        "ee" => {return 12},
+        "ree" => {return 12},
+        "hree" => {return 12},
+        "four" => {return 4},
+        "f" => {return 11},
+        "fo" => {return 11},
+        "fou" => {return 11},
+        "r" => {return 12},
+        "ur" => {return 12},
+        "our" => {return 12},
+        "five" => {return 5},
+        "fi" => {return 11},
+        "fiv" => {return 11},
+        "ve" => {return 12},
+        "ive" => {return 12},
+        "six" => {return 6},
+        "s" => {return 11},
+        "si" => {return 11},
+        "ix" => {return 12},
+        "x" => {return 12},
+        "seven" => {return 7},
+        "se" => {return 11},
+        "sev" => {return 11},
+        "seve" => {return 11},
+        "en" => {return 12},
+        "ven" => {return 12},
+        "even" => {return 12},
+        "eight" => {return 8},
+        "e" => {return 13},
+        "ei" => {return 11},
+        "eig" => {return 11},
+        "eigh" => {return 11},
+        "ht" => {return 12},
+        "ght" => {return 12},
+        "ight" => {return 12},
+        "nine" => {return 9},
+        "n" => {return 13},
+        "ni" => {return 11},
+        "nin" => {return 11},
+        "ine" => {return 12},
+        "" => {return 13},
+        _ => {return 10},
+    };
+}